core/wayland: thread-safety meta fixes + cleanups + hypr workaround

- fork go-wayland/client and modify to make it thread-safe internally
- use sync.Map and atomic values in many places to cut down on mutex
  boilerplate
- do not create extworkspace client unless explicitly requested

core/pkg/go-wayland/wayland/client/event.go

@@ -0,0 +1,120 @@
+package client
+
+import (
+	"bytes"
+	"fmt"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+
+	_ "unsafe"
+)
+
+var oobSpace = unix.CmsgSpace(4)
+
+func (ctx *Context) ReadMsg() (senderID uint32, opcode uint32, fd int, msg []byte, err error) {
+	fd = -1
+
+	oob := make([]byte, oobSpace)
+	header := make([]byte, 8)
+
+	n, oobn, _, _, err := ctx.conn.ReadMsgUnix(header, oob)
+	if err != nil {
+		return senderID, opcode, fd, msg, err
+	}
+	if n != 8 {
+		return senderID, opcode, fd, msg, fmt.Errorf("ctx.ReadMsg: incorrect number of bytes read for header (n=%d)", n)
+	}
+
+	if oobn > 0 {
+		fds, err := getFdsFromOob(oob, oobn, "header")
+		if err != nil {
+			return senderID, opcode, fd, msg, fmt.Errorf("ctx.ReadMsg: %w", err)
+		}
+
+		if len(fds) > 0 {
+			fd = fds[0]
+		}
+	}
+
+	senderID = Uint32(header[:4])
+	opcodeAndSize := Uint32(header[4:8])
+	opcode = opcodeAndSize & 0xffff
+	size := opcodeAndSize >> 16
+
+	msgSize := int(size) - 8
+	if msgSize == 0 {
+		return senderID, opcode, fd, nil, nil
+	}
+
+	msg = make([]byte, msgSize)
+
+	if fd == -1 {
+		// if something was read before, then zero it out
+		if oobn > 0 {
+			oob = make([]byte, oobSpace)
+		}
+
+		n, oobn, _, _, err = ctx.conn.ReadMsgUnix(msg, oob)
+	} else {
+		n, err = ctx.conn.Read(msg)
+	}
+	if err != nil {
+		return senderID, opcode, fd, msg, fmt.Errorf("ctx.ReadMsg: %w", err)
+	}
+	if n != msgSize {
+		return senderID, opcode, fd, msg, fmt.Errorf("ctx.ReadMsg: incorrect number of bytes read for msg (n=%d, msgSize=%d)", n, msgSize)
+	}
+
+	if fd == -1 && oobn > 0 {
+		fds, err := getFdsFromOob(oob, oobn, "msg")
+		if err != nil {
+			return senderID, opcode, fd, msg, fmt.Errorf("ctx.ReadMsg: %w", err)
+		}
+
+		if len(fds) > 0 {
+			fd = fds[0]
+		}
+	}
+
+	return senderID, opcode, fd, msg, nil
+}
+
+func getFdsFromOob(oob []byte, oobn int, source string) ([]int, error) {
+	if oobn > len(oob) {
+		return nil, fmt.Errorf("getFdsFromOob: incorrect number of bytes read from %s for oob (oobn=%d)", source, oobn)
+	}
+	scms, err := unix.ParseSocketControlMessage(oob)
+	if err != nil {
+		return nil, fmt.Errorf("getFdsFromOob: unable to parse control message from %s: %w", source, err)
+	}
+
+	var fdsRet []int
+	for _, scm := range scms {
+		fds, err := unix.ParseUnixRights(&scm)
+		if err != nil {
+			return nil, fmt.Errorf("getFdsFromOob: unable to parse unix rights from %s: %w", source, err)
+		}
+
+		fdsRet = append(fdsRet, fds...)
+	}
+
+	return fdsRet, nil
+}
+
+func Uint32(src []byte) uint32 {
+	_ = src[3]
+	return *(*uint32)(unsafe.Pointer(&src[0]))
+}
+
+func String(src []byte) string {
+	idx := bytes.IndexByte(src, 0)
+	src = src[:idx:idx]
+	return *(*string)(unsafe.Pointer(&src))
+}
+
+func Fixed(src []byte) float64 {
+	_ = src[3]
+	fx := *(*int32)(unsafe.Pointer(&src[0]))
+	return fixedToFloat64(fx)
+}